Remarkable Structure Deformation in Phenothiazine Trimer Radical Cation

A trimeric phenothiazine and its radical cation were prepared, and their structures were elucidated. In contrast to a largely twisted structure
in the neutral species, the radical cation had a unique structure deformation that allowed charge-transfer-type conjugation from the outer
phenothiazine rings to the central phenothiazine radical cation.